Yuki Fukuda, Paul Casey, and Michael Pecht
CALCE Electronic Products and Systems Center
University of Maryland
College Park, MD 20742
This paper discusses the transition to lead-free electronics, with emphasis on Japanese companies. The results of reverse engineering two Japanese minidisk players with green labels are presented. The minidisk players analyzed were Sonys MZ-E909 and Matsushitas SJ-MJ-90-A. Both of the minidisk players had three circuit cards, which were analyzed using a variety of methods including EDS, WDS, and ICP-AES. Data resulting from these tests was included along with a discussion on its significance. Moreover, the two green minidisk players were compared in terms of solder compositions and lead-free implementation strategies. This study revealed that products bearing the green label were not necessarily lead-free, but rather conformed to one of many definitions of lead-free devices. It was also found that the Japanese approach for achieving lead-free products appears to be based on an incremental transition by application, even at the board level.
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